package com.cy.demo523.untitled2.src.com.cy.dao523;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Scanner;

public class Update {
    public static void main(String[] args)throws ClassNotFoundException , SQLException {
        Connection connection = SqlCannection.getCon();
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入用户id");
        int  id = scanner.nextInt();
        System.out.println("请输入用户名");
       String   username = scanner.next();
        String sql ="update  users SET username =? where id=? ";
        PreparedStatement preparedStatement  =connection .prepareStatement(sql) ;
        preparedStatement .setString(1,username ) ;
        preparedStatement .setInt(2,id ); ;

        int i = preparedStatement.executeUpdate();
        if (i>0){
            System.out.println("修改成功");
        }
        else{
            System.out.println("修改失败");
        }
    }

}
